Stone Age settlement found under the sea in Denmark

Every time I read an article like this I end up in a rabbit hole of reading about ice ages, sea level changes, and how the human evolved throughout it. It’s mind boggling that only 20000 years ago the sea level was 120 meters lower and much of Northern Europe was covered in ice

I wonder how rapidly the change occurred - were the people aware of it happening? Did they have people saying “don’t listen to Yarg! These recent floods are just normal weather…”